JPH0453957Y2 - - Google Patents

Info

Publication number
JPH0453957Y2
JPH0453957Y2 JP19899585U JP19899585U JPH0453957Y2 JP H0453957 Y2 JPH0453957 Y2 JP H0453957Y2 JP 19899585 U JP19899585 U JP 19899585U JP 19899585 U JP19899585 U JP 19899585U JP H0453957 Y2 JPH0453957 Y2 JP H0453957Y2
Authority
JP
Japan
Prior art keywords
ball
screw shaft
head carriage
rotates
feed screw
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP19899585U
Other languages
Japanese (ja)
Other versions
JPS62104963U (en
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP19899585U priority Critical patent/JPH0453957Y2/ja
Publication of JPS62104963U publication Critical patent/JPS62104963U/ja
Application granted granted Critical
Publication of JPH0453957Y2 publication Critical patent/JPH0453957Y2/ja
Expired legal-status Critical Current

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Description

【考案の詳細な説明】 産業上の利用分野 本考案はヘツドキヤリツジの軸受構造に係り、
送りねじ軸を支持し送りねじ軸の回転によりヘツ
ドキヤリツジを軸方向に移動せしめるヘツドキヤ
リツジの軸受構造に関する。
[Detailed description of the invention] Industrial application field The invention relates to the bearing structure of a head carriage.
The present invention relates to a bearing structure for a head carriage that supports a feed screw shaft and moves the head carriage in the axial direction by rotation of the feed screw shaft.

従来の技術 従来より、プリンタのヘツドキヤリツジの駆動
機構として、ヘツドキヤリツジに挿通したスクリ
ユー軸を回転させることにより、ヘツドキヤリツ
ジを移動させる機構がある。
BACKGROUND ART Conventionally, as a drive mechanism for a head carriage of a printer, there is a mechanism that moves the head carriage by rotating a screw shaft inserted through the head carriage.

従来のキヤリツジ駆動機構におけるヘツドキヤ
リツジの軸受構造を第3図に示す。同図中、スク
リユー軸1の外周に螺旋状に断面略U字状の溝2
が設けられている。ヘツドキヤリツジの基台部3
にはスクリユー軸1の挿通される貫通孔に対して
孔4が穿設され、この孔4にピン5が圧入され
る。ピン5の先端はスクリユー軸の挿通される貫
通孔内に突出し、スクリユー軸1の溝2に噛み合
つている。
FIG. 3 shows the bearing structure of a head carriage in a conventional carriage drive mechanism. In the figure, a spiral groove 2 having a substantially U-shaped cross section is formed on the outer periphery of the screw shaft 1.
is provided. Base part 3 of the head carriage
A hole 4 is bored in the through hole through which the screw shaft 1 is inserted, and a pin 5 is press-fitted into the hole 4. The tip of the pin 5 protrudes into the through hole into which the screw shaft is inserted, and engages with the groove 2 of the screw shaft 1.

考案が解決しようとする問題点 上記従来の軸受構造では、スクリユー軸1を回
転させたとき、溝2とピン5の先端との間のすべ
り摩擦が大であるため、スクリユー軸1の回転時
の負荷が大きく、回転時に騒音が発生し、また耐
久性が悪いという問題点があつた。
Problems to be Solved by the Invention In the conventional bearing structure described above, when the screw shaft 1 is rotated, the sliding friction between the groove 2 and the tip of the pin 5 is large. Problems were that the load was large, noise was generated during rotation, and durability was poor.

そこで、本考案は第1、第2のボールを設ける
ことにより、上記の問題点を解決したヘツドキヤ
リツジの軸受構造を提供することを目的とする。
Therefore, an object of the present invention is to provide a bearing structure for a head carriage that solves the above problems by providing first and second balls.

問題点を解決するための手段 本考案において、挿通された送りねじ軸を支持
するヘツドキヤリツジの軸受構造には第1及び第
2のボールが設けられている。第1のボールは送
りねじ軸に接触しており、送りねじ軸の回転に従
つて回転する。第2のボールは第1のボール及び
ヘツドキヤリツジに接触しており、第1のボール
の回転に従つて第1のボールより低速で回転しヘ
ツドキヤリツジに対してすべりつつ回転する。
Means for Solving the Problems In the present invention, the bearing structure of the head carriage that supports the inserted feed screw shaft is provided with first and second balls. The first ball is in contact with the feed screw shaft and rotates as the feed screw shaft rotates. The second ball is in contact with the first ball and the head carriage, and as the first ball rotates, it rotates at a lower speed than the first ball and slides against the head carriage.

作 用 本考案においては、第1のボールと送りねじ軸
との間はころがり摩擦だけであり、第2のボール
は第1のボールより低速で回転しヘツドキヤリツ
ジに対してすべる。このため、送りねじ軸とキヤ
リツジ間の摩擦が小となる。
Function In the present invention, there is only rolling friction between the first ball and the feed screw shaft, and the second ball rotates at a lower speed than the first ball and slides against the head carriage. Therefore, the friction between the feed screw shaft and the carriage is reduced.

実施例 第1図は本考案になるヘツドキヤリツジの軸受
構造の一実施例の断面図、平面図、第2図は本考
案構造を適用したヘツドキヤリツジの一実施例の
分解斜視図を示す。第2図において、10はスク
リユー軸(送りねじ軸)であり、その外周には螺
旋状の溝11が設けられている。溝11は断面V
字状とされている。スクリユー軸10はヘツドキ
ヤリツジの基台部12に設けられた貫通孔を挿通
している。この基台部12の取付面12aには上
記貫通孔の軸方向と垂直となるよう円筒部13が
設けられ、更に支持部材14,15が設けられて
いる。
Embodiment FIG. 1 shows a sectional view and a plan view of an embodiment of a bearing structure of a head carriage according to the present invention, and FIG. 2 shows an exploded perspective view of an embodiment of a head carriage to which the structure of the present invention is applied. In FIG. 2, 10 is a screw shaft (feed screw shaft), and a spiral groove 11 is provided on its outer periphery. The groove 11 has a cross section V
It is said to be a letter. The screw shaft 10 is inserted through a through hole provided in the base portion 12 of the head carriage. A cylindrical portion 13 is provided on the mounting surface 12a of the base portion 12 so as to be perpendicular to the axial direction of the through hole, and support members 14 and 15 are further provided.

基台部12の取付面12a上にヘツド取付部1
6が載置され、支持部材14,15によつて固定
される。ヘツド取付部16はヘツド17のアツ
プ/ダウン駆動を行なうと共に、後述するインク
リボンの巻取駆動を行なう。このため、ヘツド取
付部16の載置面16aにはインクリボンの巻取
軸18、供給軸19が設けられている。載置面1
6a上にはインクリボン20を巻回して収納した
インクリボンカートリツジ21が載置される。こ
のとき巻取軸18、供給軸19夫々がインクリボ
ンカートリツジ21の孔22,23夫々を挿通し
てインクリボンを巻回したリールハブに係合し、
巻取軸18の回転駆動によりインクリボン20の
巻取りが行なわれる。
The head mounting portion 1 is mounted on the mounting surface 12a of the base portion 12.
6 is placed and fixed by support members 14 and 15. The head mounting portion 16 not only drives the head 17 up/down, but also winds up the ink ribbon, which will be described later. For this purpose, an ink ribbon take-up shaft 18 and a supply shaft 19 are provided on the mounting surface 16a of the head mounting portion 16. Placement surface 1
An ink ribbon cartridge 21 containing a wound ink ribbon 20 is placed on the ink ribbon 6a. At this time, the take-up shaft 18 and the supply shaft 19 are inserted through the holes 22 and 23 of the ink ribbon cartridge 21, respectively, and engaged with the reel hub around which the ink ribbon is wound,
The ink ribbon 20 is wound up by rotationally driving the winding shaft 18.

第1図Aにおいて、基台部12の円筒部13内
には、円筒部13の内径と略同一径である大径の
スチールを鏡面仕上げした第1のボール30が挿
入され、ボール30はスクリユー軸10の鏡面仕
上げによるV字状の溝11の2辺夫々に点接触し
ている。円筒部13内のボール30上には互いに
同一径である小径のスチールを面仕上げした第2
のボール31,32,33が載置され、更にボー
ル30〜33上にボール30より小径でボール3
1より大径である中径のスチールを鏡面仕上げし
た第3のボール34が載置されている。ボール3
1,32,33夫々は互いに点接触すると共に、
ボール30,34及び円筒部13の内周夫々に点
接触している。ボール34の上部はストツパ35
の円錐状の凹部35aに線接触しており、ストツ
パ35は円筒部13の内周に例えばネジ止めされ
て固定されている。上記のボール30〜34はス
トツパ35方向より見たとき第1図Bに示す如き
位置関係となる。
In FIG. 1A, a first ball 30 made of mirror-finished steel with a large diameter and approximately the same diameter as the inner diameter of the cylindrical portion 13 is inserted into the cylindrical portion 13 of the base portion 12, and the ball 30 is screwed into the cylindrical portion 13 of the base portion 12. Point contact is made with each of two sides of a V-shaped groove 11 formed by mirror finishing of the shaft 10. On the ball 30 in the cylindrical part 13 is a second plate made of small diameter steel with the same diameter.
Balls 31, 32, and 33 are placed on top of the balls 30 to 33, and a ball 3 with a smaller diameter than the ball 30 is placed on top of the balls 30 to 33.
A third ball 34 made of medium-diameter steel with a mirror finish and a diameter larger than that of the third ball 34 is mounted. ball 3
1, 32, and 33 are in point contact with each other, and
Point contact is made with the balls 30, 34 and the inner circumference of the cylindrical portion 13, respectively. The top of the ball 34 is a stopper 35
The stopper 35 is fixed to the inner periphery of the cylindrical portion 13 by screwing, for example. The above balls 30 to 34 have a positional relationship as shown in FIG. 1B when viewed from the direction of the stopper 35.

ここで、スクリユー軸10が回転すると、大径
のボール30は溝11の移動に従つて円筒部13
の内周に接する2点を通る軸を中心として回転す
る。このボール30の回転によつて小径のボール
31,32,33夫々は回転せしめられ、ボール
31,32,33の回転によつて中径のボール3
4が回転せしめられる。このとき、大径のボール
30はスクリユー軸10の回転に略追従してころ
がり摩擦だけで高速回転する。しかるに中径のボ
ール34はストツパ35の凹部35aに線接触
し、また凹部35aは鏡面より粗い仕上げである
ので、中径のボール34にはすべり摩擦が働きそ
の回転は低速である。上記ボール30と34との
間にある小径のボール31,32,33夫々には
ころがり摩擦とすべり摩擦が働き、ボール30と
34の中間の速度で回転する。つまりボール31
〜33及び34はボール30の回転を減速してス
トツパ35に伝えている。
Here, when the screw shaft 10 rotates, the large diameter ball 30 moves into the cylindrical portion 13 as the groove 11 moves.
It rotates around an axis that passes through two points that touch the inner circumference of the The rotation of the ball 30 causes the small diameter balls 31, 32, 33 to rotate, and the rotation of the balls 31, 32, 33 causes the medium diameter ball 3 to rotate.
4 is rotated. At this time, the large diameter ball 30 substantially follows the rotation of the screw shaft 10 and rotates at high speed only by rolling friction. However, since the medium-diameter ball 34 is in line contact with the recess 35a of the stopper 35, and the recess 35a has a rougher finish than a mirror surface, sliding friction acts on the medium-diameter ball 34 and its rotation is slow. Rolling friction and sliding friction act on the small-diameter balls 31, 32, and 33 located between the balls 30 and 34, respectively, and the balls rotate at an intermediate speed between the balls 30 and 34. In other words, ball 31
33 and 34 decelerate the rotation of the ball 30 and transmit it to the stopper 35.

このように、スクリユー軸10の溝11とボー
ル30との間はころがり摩擦であり、更にボール
30が直接ストツパ35に接触せず、ボール31
〜33及び34で減速してストツパ35に対する
ボール34のすべり摩擦が小さくされている。こ
のため、スクリユー軸10の回転時の負荷が従来
に比して大幅に小さくなり、回転時にはほとんど
騒音が発生せず、耐久性も向上する。
In this way, there is rolling friction between the groove 11 of the screw shaft 10 and the ball 30, and furthermore, the ball 30 does not directly contact the stopper 35, and the ball 31
33 and 34, the sliding friction of the ball 34 against the stopper 35 is reduced. Therefore, the load when the screw shaft 10 rotates is significantly reduced compared to the conventional screw shaft, almost no noise is generated during rotation, and durability is improved.

なお、上記実施例では、ヘツド取付部16でイ
ンクリボンの巻取駆動を行なつているが、ヘツド
取付部はヘツド17のアツプ/ダウン駆動のみを
行ない、インクリボンの巻取駆動はプリンタの別
の場所で行なう構成であつても良いことは勿論で
ある。
In the above embodiment, the head mounting section 16 drives the ink ribbon to be wound up, but the head mounting section only drives the head 17 up and down, and the ink ribbon winding drive is carried out separately in the printer. It goes without saying that the configuration may be such that it is carried out at a location.

考案の効果 上述の如く、本考案になるヘツドキヤリツジの
軸受構造は、第1及び第2のボールを設けてなる
ため、送りねじ軸と第1のボールとの間はころが
り摩擦であり、第2のボールは第1のボールより
低速で回転してキヤリツジに対してすべるため、
送りねじ軸の回転時の負荷が小さくほとんど騒音
の発生がなく、耐久性が向上する等の特長を有し
ている。
Effects of the invention As mentioned above, since the bearing structure of the head carriage according to the invention is provided with the first and second balls, there is rolling friction between the feed screw shaft and the first ball, and there is rolling friction between the feed screw shaft and the first ball. The ball rotates at a slower speed than the first ball and slides against the carriage, so
It has features such as a small load when the feed screw shaft rotates, almost no noise, and improved durability.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本考案構造の一実施例の断面図、平面
図、第2図は本考案構造を適用したヘツドキヤリ
ツジの一実施例の分解斜視図、第3図は従来構造
の一例の断面図である。 10……送りねじ軸(スクリユー軸)、11…
…溝、12……基台部、13……円筒部、16…
…ヘツド取付部、21……インクリボンカートリ
ツジ、30……第1のボール、31〜33……第
2のボール、34……第3のボール、35……ス
トツパ。
Fig. 1 is a sectional view and a plan view of an embodiment of the structure of the present invention, Fig. 2 is an exploded perspective view of an embodiment of a head carriage to which the structure of the invention is applied, and Fig. 3 is a sectional view of an example of a conventional structure. be. 10...Feed screw shaft (screw shaft), 11...
...Groove, 12...Base part, 13...Cylindrical part, 16...
...Head attachment part, 21...Ink ribbon cartridge, 30...First ball, 31-33...Second ball, 34...Third ball, 35...Stopper.

Claims (1)

【実用新案登録請求の範囲】 (1) ヘツドキヤリツジに挿通された送りねじ軸を
支持し、該送りねじ軸の回転により該ヘツドキ
ヤリツジを軸方向に移動せしめるヘツドキヤリ
ツジの軸受構造において、該送りねじ軸に接触
し送りねじ軸の回転に従つて回転する第1のボ
ールと、該第1のボール及び該ヘツドキヤリツ
ジに接触し該第1のボールの回転に従つて回転
する第2のボールとを設けてなるヘツドキヤリ
ツジの軸受構造。 (2) 該第2のボールは複数のボールで構成してな
る実用新案登録請求の範囲第1項記載のヘツド
キヤリツジの軸受構造。
[Scope of Claim for Utility Model Registration] (1) In a bearing structure of a head carriage that supports a feed screw shaft inserted into a head carriage and moves the head carriage in the axial direction by rotation of the feed screw shaft, the bearing structure contacts the feed screw shaft. A head carriage comprising: a first ball that rotates as the feed screw shaft rotates; and a second ball that contacts the first ball and the head carriage and rotates as the first ball rotates. bearing structure. (2) The bearing structure for a head carriage according to claim 1, wherein the second ball is composed of a plurality of balls.
JP19899585U 1985-12-24 1985-12-24 Expired JPH0453957Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19899585U JPH0453957Y2 (en) 1985-12-24 1985-12-24

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19899585U JPH0453957Y2 (en) 1985-12-24 1985-12-24

Publications (2)

Publication Number Publication Date
JPS62104963U JPS62104963U (en) 1987-07-04
JPH0453957Y2 true JPH0453957Y2 (en) 1992-12-18

Family

ID=31160206

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19899585U Expired JPH0453957Y2 (en) 1985-12-24 1985-12-24

Country Status (1)

Country Link
JP (1) JPH0453957Y2 (en)

Also Published As

Publication number Publication date
JPS62104963U (en) 1987-07-04

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